What Would a Drug That Caused Sodium to Leak into a Neuron

Question

What would a drug that caused sodium to leak into a neuron do?
A) It would cause the outside of the neuron to become more positive.
B) It would trigger an action potential in the neuron.
C) It would cause the inside of the neuron to become more negative.
D) It would cause potassium to move into the neuron as well.

Accepted Answer

Sodium ions moving into a neuron decrease the membrane potential (make it less negative), which can trigger an action potential if the threshold is reached. This is because the influx of positively charged sodium ions makes the inside of the neuron more positive relative to the outside.